Table-actuating mechanism for multiple-cylinder-grinding machines



Jan. 17, 1928. 1,656,332'

6. KNOWLES TABLE ACTIIATING MECHANISM FOR MULTIPLE CYLINDER GRINDING MACHINES Filed Sept. 17, 1925 2 Sheets-Shoot 1 fill EN TOR .4 TTOHNEY Jan. 17; 1928;

C. KNOWLES TABLE ACTUATING MECHANISM FOR MULTIPLE CYLINDER GRINDING MACHINES Filed Sept. 17. 1925 2 Sheets-Sheet 2 I I l I 1 i 1 NVENTOR ATTORNEY Patented Jan. 17, 1928.

UNITED. STATES PATENT OFFICE.

CARROLL KnowLns, or HARTFORD, connnc'rrco'r, ASSIGNOR T ranrr & wnxrnnr company, on NEW YORK, n. Y., A conroaarron on new annsnv.

TABLE-AGTU ATING mncnnnrsm non MULTIPLEQCYLINDER-GRINDING MACHINES.

Application filed September 17, 1925. Serial No. 57,002.

This invention relates to cylindrical grind ing machines for internal surfaces and in particular to a machine of this type adapted to simultaneously grind a plurality of bores in alinement. More particularly the invention relates ,to an internal surface grinding machine for grinding the cylindrical surfaces of a multiple cylinder internal combustion engine such as used. in automobiles.

A principal object ofthe invention is to provide'a work table actuatingmechanism adapted to move the table supporting the cylinder block being ground bodily ina planetary path so that eachof the alined cylin ders may be simultaneously ground to a high precision. i

One feature which is advantageousiis that I provide but one eccentric for actuating the work support in its planetary path and provide two superposed slides movable at right angles to each other so that the upper slide, on which he work to be ground is mounted, may be actuated in a planetary or bodily circular path while maintained always parallel to the line of grinding spindles. Another primary object of the invention is therefore to provide actuating mechanism for the work supporting table which will have but one driving member in engagement withsaid table and which will be the only member to .be adjusted to vary the movement of the table.

"A further object of the invention is to pro vide a simple, efl'ective anddurable mechanism for actuating the work support for a multiple spindle cylindrical grinding machine permitting an automobile engine block to have all of its internal cylindrical surfaces ground simultaneously.

" With these and other objects in'view, my

invention consists in the features of construction and operation set forth in the following specification and illustrated in the accompanying drawings; In the accompanying drawings annexed hereto and forming a part ofthis specification, I have shown my invention embodied in a grinding machine for automobile engine cylinders but it will be understood that the inventionfcan be embodied in different forms of machines and that the drawings are not to be construed as defining or limiting the scope of the invention, the claims ape pended to this specification being relied upon for that purpose.

In the drawings: t Figure 1 is a side elevaion of a complete grinding machine, parts of the work support and actuating mechanism therefor "being shown in section.

Fig. 2 is a plan viewof the work supporting members, with the column and grinding spindles removed. a i

Fig. 3 is a fragmentary front elevation of the work supporting slides showing an engine block in position for operation.

In the above mentioned drawings, I have shown but one embodiment oftheinvention which is now deemed preferable, but it is to be understood that changes and modifica tions may be made within the scope of the 7 strained to move in directions normal to each other; fifth, actuating means comprising a unitary eccentric mechanism for bodlly moving the upper or Work supporting slide in a planetary path of different radii; sixth, a plurality of grinding wheels rotatably mounted, one for each of the cylinders to be ground; seventh, means to support, traverse and rotate these grinding wheels during the planetary movement of the supporting table.

Referring more in detail to the figures of the drawings, I provide a base 10 on which 1 may be mounted a work supporting table 11. This table 11 is, in the embodiment illustrated, adapted to move about in a horizontal plane. Between this work supporting table 11 and the. base 10 is an intermediate slide 12, the intermediate slide 12 being adaptedto rest upon a horizontal surface of the base 10 and move forward and rearward on suitable guiding projections 13 therefor. The guiding projections 13 are formed on the upper horizontal surface of the base 10, one in front and one in the rear. These projections 13 are engaged within guideways 14 formed in the lower surface of the intermediate slide 12. On the upper surface of this intermediate slide 12 are horizontal guideways 15 engaged by projections 16 formed on the lower surface of the work supportin table 11 so that the Work supporting table 11 may move upon the intermediate slide 12 in a straight line. The guideways 14 and 15 are, as shown clearly in Figs. 2 and 3, disposed at right angles to each other so that the supporting table 11 may be moved in any direction rela tive to the base 10 by means of its movement relative to the intermediate slide 12 and the movement of the intermediate slide 12 relative to the base 10. As shown in Fig. 2, the upper slide'or table 11 and the forward portions of the intermediate slide 12 are extended toward the right and left and the guideways 15 and projections 16 on these members are provided near their extreme ends. In this way the table 11 is accurately guided.

In order to actuate the work supporting table 11 in av planetary path so that the cylindrical surfaces of the parts being ground may be simultaneously engaged with the grinding wheels 17, an eccentric 18 is mounted within the base 10 as shown clearly in Fig. 1. This, as shown, is disposed vertically and is of the compound type so that the radius of movement of the eccentric projection 19 at its upper end may be widely varied. As the construction of this eccentric 18 and associated parts are or may be similar in every way to those shown and described in my copending application Serial No. 16.343, filed March 18, 1925, it is not thought necessary to describe the mechanism in detail. It will be sufiicient tostate that by rotating the two worm wheels 20 and 21 shown in Fig. 2 simultaneously and at exactlv the same speed. the eccentric can be rotilted with its projection at a constant radii from its axis of rotation and that by relative rotation of the two worm wheels, preferably by a differential mechanism 22, the radius of rotation of the eccentric projection 19 can be increased or decreased. As shown in Fig. 1, the intermediate slide 12 V has an elongated opening through which parts of the eccentric 18 and projection 19 may extend and the work supporting table 11 is provided with a bushing 23 forming a bearing closely fitting the eccentric projection 19. The eccentric movement applied to this bushing 23 within the supporting table 11 actuates the work supporting table 11 in a planetary path by reason of the combined movement of the two slides 11 and 12. The intermediate slide 12 is constrained by the guides 13 in the base 10 to move forward or rearward, and the work suporting slide 11 is adapted to slide only in a direction toward the left or right by means of the guideways 15. The work supporting table 11 must therefore always assume parallel positions and as the eccentric projection 19 moves in a circular path of any diameter dependent upon the adjustment of the worm gears 20 and 21, the work supporting table 11 may move in a planetary path having the same radii;

The abrasive wheels 17 are, as shown in Fig. 1, supported at the lower ends, of spindles 25 within individual heads 26 on a cross rail 27 adjustable vertically on a column 28. As themeans for supporting, adjusting and rotating the abrasive wheels 17 form no part of the present invention and may be similar to the means described in my copending application, no further description is thought to be necessary.

lVhat I claim is:

1. A grinding machine comprising in combination, a base, a column, a. plurality of grinding spindles adjustably mounted thereon, a work support comprising a pair of inter-engaged slides movable in directions at right angles to each other, and means to actuate one of said slides whereby all points in said slide are rotated.

2. A grinding machine comprising in combination, a base, a column, a plurality of grinding spindles adjustably mounted thereon, a work support comprising a pair of inter-engaged slides movable in straight lines in directions at right angles to each other, and means to actuate one of said slides whereby all points in said slide are rotated.

3. A grinding machine comprising in combination, a base, a column, a plurality of grinding spindles adjustably mounted thereon, a work support comprising a pair of inter-engaged slides movable in directions at right angles to each other, and unitary means disposed centrally of said slide to actuate one of said slideswhereby all points in said slide are rotated in a circle of diiferent diameters.

4. A multiple spindle cylindrical grinding machine comprising in combination, a base, a column, a plurality of adjustably mounted spindles having abrasive wheels thereon mounted on said column, a Work support on said base comprising a pair of superposed slides movable in directions at right angles to each other. and an eccentric adapted to actuate one of said slides.

5. A multiple spindle cylindrical grinding machine comprising in combination, a base, a column, a plurality of vadjustably mounted spindles having abrasive wheels thereon mounted on said column, a work support on said base comprising a pair of superposed slides movable in directlons at right angles to each other, an eccentric adapted to actuate one of said slides, and means to adjust the movement imparted to said slide by said eccentric during operation of said machine.

6. A multiple spindle cylindrical grinding machine comprising in combination, a base, a column, a plurality of adjustably mounted spindles having abrasive wheels thereon mounted on said column, a work supporton said base comprising a pair of superposed slides movable in a horizontal plane in directions at right angles to each other, and an eccentric positioned centrally of one ofsaid slides adapted to actuate said slideengaged by said eccentric in a circular path.

7. A work su port for multiple spindle cylindrical grin ing machines comprising in combination, a base, a slide movable in a straight line thereon, a second slide movable on said first slide in a direction at right angles to the movement of said first slide, work supporting meansonsaid second slide, and means engaging one of said slides at its midportion to actuate all points in said second slide in a circular path.

8. A work support for multiple spindle cylindrical grinding machines comprising in combination, a base, a slide movable in a horizontal plane in a straight line thereon, a second slide movable on said first slide in a direction at right angles to the movement of said first slide and in a lane parallel thereto, and a centrally pos1tioned eccentric engaging said second slide and adapted to actuate all oints in said second slide in a circular pat 9. A work support for multiple spindle cylindrical grinding machines comprising in combination, a base, a slide movable in a straight line thereon, a second slide movable on said first slide in a direction at right angles to the movement of said first slide, an eccentric engaging said second slide and adapted to actuate all points in said second slide in a circular path of predetermined second slide will be actuated bodily in aplanetary path.

In testimony whereof, hereto afiix my signature.

CARROLL KNOWLES.

, difierent diameters, and means to adjust said a 

